Warning: include(): open_basedir restriction in effect. File(/root/phalcon-devtools/bootstrap/autoload.php) is not within the allowed path(s): (/home/admin/web/(mydomain)/public_html:/home/admin/tmp:/root/phalcon-devtools) in /home/admin/web/(mydomain)/public_html/_phalcon/test/public/webtools.php on line 26

Warning: include(/root/phalcon-devtools/bootstrap/autoload.php): failed to open stream: Operation not permitted in /home/admin/web/(mydomain)/public_html/_phalcon/test/public/webtools.php on line 26

Warning: include(): Failed opening '/root/phalcon-devtools/bootstrap/autoload.php' for inclusion (include_path='.:/usr/share/php') in /home/admin/web/(mydomain)/public_html/_phalcon/test/public/webtools.php on line 26

Fatal error: Class 'Phalcon\Bootstrap' not found in /home/admin/web/(mydomain)/public_html/_phalcon/test/public/webtools.php on line 28

The problem was in incorrect $SERVER['REMOTEADDR'] value - apache2 rpafmodule not worked propertly and the IP was wrong. According to Phalcon devtools sources $SERVER['REMOTEADDR'] is used to determine user IP.